Billal sir is a good human being tbh.

Billal sir is a good human being tbh. But nowadays, he has become so rude and he started marking in so narrowly. If you're seeing this sir, you have qualities to become one of the bestt teachers of the department but your recent behavior is exacerbating these qualities. You could have set some criterion before starting to check scripts. There are lot of people who do not deserve to get 0 only due to calculation error, they might have done everything right except the calculation.